Balance-escapement.



PATENTED APR. 14, 1903 E. BUYSSE. I BALANCE ESGAPEMENT. ATPLIOATION FILED SEPT. a, 1902.

N0 MODEL.

UNITED STATES EDWARD BUYSSE, OF SOUTH BEND, INDIANA.

BALANCE-ESCAPEMENT;

SPECIFICATION forming part of Letters Patent No. 725,087,

dated April 14, 1903.

Application filed September 3, 1902. Serial No. 121,981; (No model.)

1'0 aZZ whom it may concern:

Be it known that I, EDWARD BUYssE, a citizen of the United States, residing at South Bend, in the county of St. Joseph and State of Indiana, have invented certain new and useful Improvements in Balance Escapements; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same,

My invention has relation to improvements in Watches, clocks, and other time-registering mechanisms wherein a vibratory pallet and arm are associated with the balancewheel and escapement-wheel; and the object is to provide improved means to stop the ac tion of the associated mechanism in instances where it becomes unduly accelerated purposely with the design or intention to register or disclose a longer period in a shorter time.

It is well known that a very perceptible acceleration may be imparted to the mechanism of the kind involved by giving a rapid oscillatory or vibratory motion to the casing and thereby making indications incorrrect. It is the purpose of the present invention to provide means to stop the mechanism when such attempts are made.

I accomplish the objects of the invention by the means illustrated in the accompanying drawings, forming apart of this specification, and wherein- Figure 1 is a view, on an enlarged scale,of a balance-wheel, a pallet and lever, and a portion of an escapement-wheel with the springcatch operatively applied to the lever. Fig. 2 is a detail view showing the roller-jewel disengaged from its seat and lodged against the side of the lever. Fig; 3 is a detail view showing the balance-Wheel thrown back from its position indicated in Fig. 2 and the rollerjewel as lodged behind the spring-catch.

Referring to the drawings,'l designates a balance-wheel of a timepiece made in any of the approved styles and mounted as usual. It has not been deemed essential to a clear understanding of the improvements to show certain well-known equipments and parts associated with and carried by the balancewheel. From the hub of the balance-wheel projects the roller-jewel pin 2, which normally engages and operates in a central openend slot 3, formed in the head of the palletlever 4. The head of the pallet-lever is made with upwardly-curved edges, as 5, extending in opposite directions from the mouth of the slot, so that the roller-jewel will travel thereon when dislodged from the slot. The palletlever 4 extends the proper distance and at the proper point has secured thereto the pallet 6, which is engaged and actuated inthe usual manner by the escapement-wheel 7.

It will be perceived that if the mechanism thus described be unduly accelerated by jerks, oscillation, or vibration the rollerjewel will be thrown out of the slot, the balance will vibrate with increased speed, and the time will not be true time. To prevent this and to thwart and disclose efforts to produce accelerated movement I attach a catchspring 8 to the pallet-lever and extend its free position upward and lying adjacent to the curved outer edge of the head of the lever, so that when the roller-jewel pin 2 is carried over the arm of the head it will enter behind the spring and there lodge, and the mechanism will suspend motion until the roller-jewel pin is released and restored to normal position.

More particularly specifying the action or operation accompanying an overt attempt to produce accelerated movement of the mechanism, it may be stated that the extra movement dislodges the-roller-jewel and carries it over the head of the pallet-lever to a position indicated in Fig.2, and then on the return movement it is carried over the head at the opposite side, as indicated in Fig; 3, and lodges behind the spring 8, where it is held until released.

Having thus described my invention, what I claim is- 1. The combination with the balancewheel, provided with a roller-jewel, and the pallet-lever, of a catch-spring on the palletlever arranged to engage and hold the rollerjewel when dislodged from the lever, as described.

2. The combination with the balance-Wheel provided with a roller-jewel, and the palletlever formed with a head in which the rollerjewel is loosely seated, of a catch-spring secured to the outer edge of the head of the pallet-lever and arranged to hold the roller-jewel I cent to the outer edge of the head to engage 16 when moved off the head of the lever. and hold the roller-jewel when moved be- 3. The combination of the balance-wheel hind it. provided with a roller-jewel, the pallet-lever In testimony whereof I affix my signature formed with a head having an open end slot in presence of two witnesses.

wherein the roller-jewel is detachably seated EDWARD BUYSSE. and outwardly-curved arms, and a catch- Witnesses: spring secured to the pallet-lever and ar- GEORGE OLTSOH,

ranged with a free portion extending adja MAGGIE OLTsOHi 

